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Finding the Fourth Proportional to 312,179.64, 430,807.88 and 168,939.68

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Solution

The fourth proportional to 312,179.64, 430,807.88 and 168,939.68 is: 233,136.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,179.64 : 430,807.88 = 168,939.68 : x
  2. Step 2: Convert to fraction form
    312,179.64/430,807.88 = 168,939.68/x
  3. Step 3: Cross multiply
    312,179.64x = 430,807.88 × 168,939.68
  4. Step 4: Simplify right side
    312,179.64x = 72,780,545,388.68
  5. Step 5: Solve for x
    x = 72,780,545,388.68/312,179.64
  6. Step 6: Final answer
    x = 233,136.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.